Find the product of 1 - 120 and 2 - 33 - 24. Hence, solve the system of equations:

x - y + 2z = 1
2y - 3 = 1
3x = 2
a) x = -1, y = 2, z = 0
b) x = 2, y = -1, z = 1
c) x = 1, y = 0, z = 1
d) x = 0, y = 1, z = 0